// This source code is dual-licensed under the Apache License, version
// 2.0, and the Mozilla Public License, version 2.0.
//
// The APL v2.0:
//
//---------------------------------------------------------------------------
//   Copyright (c) 2007-2025 Broadcom. All Rights Reserved.
//
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//
//       https://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.
//---------------------------------------------------------------------------
//
// The MPL v2.0:
//
//---------------------------------------------------------------------------
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
//
//  Copyright (c) 2007-2025 Broadcom. All Rights Reserved.
//---------------------------------------------------------------------------

using System;
using System.Collections.Specialized;
using System.Web;
using Xunit;

namespace OAuth2Test
{
    public class RequestFormMatcher
    {
        private readonly NameValueCollection _expected = new NameValueCollection();

        public RequestFormMatcher WithParam(string key, string value)
        {
            _expected[key] = value;
            return this;
        }

        public Func<string?, bool> Matcher()
        {
            return (body) =>
            {
                if (body is null)
                {
                    throw new ArgumentNullException(nameof(body));
                }

                NameValueCollection actual = HttpUtility.ParseQueryString(body);
                Assert.Equal(_expected.Count, actual.Count);
                foreach (string k in actual.Keys)
                {
                    Assert.NotNull(_expected[k]);
                    Assert.Equal(_expected[k], actual[k]);
                }
                return true;
            };
        }
    }
}
